Gas anchor



March 13, 1928.

C. A. CARLSON GAS ANCHOR Filed A112. 24. 1925 ollllll!!! Illlfrl 1 ig/2V4 rlflrlllflfll all! ATTQQ WEK Patented Mar. 13, i I i i I I UNITED ST TES OFFIC CHARLES A. CARI a F BEACH, CAL I FORN IA. i v

V enshncnon. I

Application filed August 24, 1 825. seriall lilfo, 52,139.

My invention relatesto theart of pump Fig. 4 is a section taken on the line 4 4; ing petroleum oil and it relates particularly of Fig, 2. V p to a'novel gas anchon It is Well known in \Vith reference to'Fig. 1 I shovva pump this art that the efliciency of an oil well tubingll which extends: to thelo-wer end of 5 pump is impaired by the presence of gas in a well 1 2' and has a pump barrel 13 conthe crude petroleum oil being pumped. To nected to the lowerfend thereof, Extending effecta separation of oil and gas so that only fronithe pump ban-e113 is a nipple 14, to oil enters: the pump, it isconnnon practice to the lower end of which is attached a stand connect a gas anchor below the pump, Which mg valve body 16,. IA gas, anchor 18 of my 60 gas anchor excludes gas from the pump and Invention is secured to the lower end of the permits it to operate ata higher efliciency standing valve bo'dy'l6. than it would if the gas were not separated Asshovvn clearly in Figs, 2,3 and 4, th f th 11, gas anchor 18 of my invention has an upper It is an object of this invention to provide connector body 20 whichlis "threaded at "its, 65 a gas anchor "which is eificient in separating npper end'as indicated at 21, thus adapting' gas d n a 1550 be secured to the standing valve body It is another object of this invention to 16. The connector body has an openingprovide a gas anchor in which a separating 22 formed there-through, An upperend 23 chamber is in full communication at its of an inner barrel 24 is threadably secured 70 20 upper end with the exterior of the gas in a threaded cavity 26 of t he connector It is also an object of the invention to pro The lower end of the inner barrel 2i is,

vide a gas anchor having .means for break-. threadably securedlin a ca vity28 of a guide;

ing up the mixture'of gas and oil. plug 29, having a rounded nose 30, thi gi id 75 It is another object of this invention to plug 29closing the lo wer end of the inner provide a gas anchon which consists of few barrel E24. plurality of elongated open rugged parts which are uniquely attached 1ngs32 is cut in the barrel 2 1 near the lower. t th r, end thereof, which elongated openings 32.

It is also an object of this invention to connectbetween theiinterior and exterior of go 30 provide a guide. plug at the lower end of the the barrel. An outer barrel '34 is placed gas anchor for guiding ittl' rough the well concentrically around the inner barrel 24 casing when itrislpwered to the bottom of a and an. annular separating space is thus w ll, formed between these inner and outer barrels It is another object of this invention to and 34. It should be noted, as clearly 35 35 provide centralizing means for centralizing shown in ljig'. 2, tha he upper end of the the upper ends of an inner and outer barrel outer, barrel 34L terminates *below the conoi my invention. nector body 20 and also that the annular Other objects and advantages of this in-. space-35 is fully, open at its upper-end. The vention will be made evident hereinafter. lower end of the outer barrel 34; is threadably 90 Referring to the drawing inwhich I illussecured at 36 to the upper part of the guide trate my invention, I plug 29. The outer barrel 34 extends almost Fig. 1 is a diagrammaticviewshowing a the entire length of the inner barrel24, tergas, anchor of my invention attached to the minating a short distance below the upper lower end of a string of drill tubingbfil Pfy i i y i-l w ll pump. Extendlng from the inner barrelj24 near Fig, 2 is anenlargedpartially sectioned the supper/end thereof is a plurality vof and contracted viewshowing the gas anchor radial centralizing fins The outer edges of invention, 1 Y 390f these fins 38 may engage an inner face Fig Eli s; a sectiontakenon; the line 33 40 of the outer barrel 34 for centralizing 100 of Fig 2, this view showingthe centralizing the. upper end of the,- outer barrel- Biwith means of my invention. respect-to the inner-barrel 24.

The operation of my invention is substantially as follows:

The oil in the well 12 in order to reach the pump barrel 13 must pass upward around the exterior of the outer barrel 3% and then downward through the annular separatlng space until it reaches the elongated openings The oil passes through the elon' gated openings 32 and u ward through the interior of the inner barrel Qet and then passes through the opening 22 of the connector body :20, the standing valve body 16 and the nipple 14, thereby reaching the barrel 13. The oil flows into and through the gas anchor 18 of my invention during the up stroke of a plunger, not shown, which is situated in the barrel 13, there being a suction created at this time which draws the oil into the barrel. It should be noted that the oil to pass through the gas anchor must reverse its direction, as indicated by the arrow 43 of Fig. 2, at the upper end of the outer barrel 3t. It the oil in the well contains gas, the suction produced by the up stroke of the plunger in the barrel does not greatly ailect the upward travel of the gas due to the fact that the gas is so much lighter than the oil. Therefore, the gas carried in the oil is not reversed or drawn downward through the separating space 35. There is, however, a. slight tendency for small bodies of gas to be drawn into the upper end of the separating space 35 because of the viscosity of the oil; but it soon reverses its direction due to its lightness and travels upward in the space 35 and upward in the well 12 outside the gas anchor 18. By reason of the fact that the annular space 35 is fully open at its upper end the gas may readily separate from the oil and pass upward through the well on the exterior of the pump tubing. By forming the annular space so as to be open at its upper end there are no cavities formed in which gas may collect. This is a desirable feature since any gas which collects tends to interfere with the normal operation of the gas anchor. The centraliziup fins 38 serve a dual purpose; they not only centralize the inner and outer barrels, but they also break up the oil and gas which renders the separation easier. Practically none of the gas will pass to the lower part of the separating space 35 and pass through the elongated openings 32 into the interior of the inner barrel 2d: and thus reach the pump barrel 13. Holes are provided in the connector body 20; these holes connect the interior and exterior thereof and provide an outlet for any gas which might get inside the inner barrel 24.

It is very obvious from the drawing that the gas anchor of my invention is very simple in design. My gas anchor consists of four parts. namely, the connector bodv 20,

the inner barrel 2 the guide plug 29 and the outer barrel 34-.

The guide plug 29 is provided with a rounded nose 30 so that it will pass readily through the. casing of the well when it is being lowered to the bottom thereof.

The plug 25) serves as a means for connect ing the inner and outer barrels 2-; and 31 together, this being a very simple construction. The upper ends oi the barrels i-land 3t are retained concentric by means of radial centralizing tins The novel features of my invention not only provide an etiicient gas anchor, but also cooperate to provide a gas anchor which has advantages of construction. namely, simplicity. which makes the manufacturing cost thereof low and the installation thereof easy, and rigidity, which is possible because the parts may be made very heavy.

Another feature of my lIiYtilliiUIl, aiiirmcd in practice, is that it can be run into small liners and obtain results equivalent to big pipe.

I claim as my invention:

1. In a gas anchor, the combination of: a tubular connector body adapted to be at tached to a supporting member; an inner barrel having its upper end secured to the lower end of said connector body, there being openings termed near the lower end of said inner barrel for connecting the exterior of said inner barrel with the interior thereof; a guide plug secured to the lower end of said inner barrel, said guide plug closing the lower end of said inner barrel; an outer barrel secured at its lower end to said guide plug, said outer barrel being conccntrical around said inner barrel, there being an annular separating space formed between said inner and said outer barrels, the upper end of said outer barrel terminating below said conncctonbody; and centralizing fills formed near the upper end of said inner barrel, said centralizing fins being arranged to engage an inner face of said outer barrel.

2. in a gas anchor, the colnbinathm ot': a tubular connector body adapted to be at tachcd to a supporting member; an inner barrel having its upper end scoured to the lower end of said connector body, there bcing elongated openings formed near the lower end of said inner barrel for connecting the exterior of said inner barrel with the interior thereof; a round nose guide plug having a cavity in which a lower end of said inner barrel is secured, said guide plug closing the lower end of said inner barrel; an outer barrel secured at its lower end to said guide plug. said outer barrel being concentrical around said inner barrel, there being an annular separating space formed between said inner and said outer barrels; and radially extending centralizing fins t'ormed near the upper end of said inner barrel, said cenwhich the connector body is provided with 10 tralizing fins being arranged to engage an a port in its side Wall establishing direct inner face of said outer barrel. communication between the interior and ex- 3. The combination defined in claim 1 in terior thereof.

5 which the connector body is provided with a In testimony whereof, I have hereunto set port in its side Wall establishing direct commy hand at Long Beach, California, this 15 n'lunication between the interior and exterior 17th day of August, 1925. i thereof.

4. The combination defined in claim 2 in CHARLES A. CARLSON. 

